Description
Marathon Septa N 11,5, CenterGuide (TM) are gas chromatography septa with a diameter of 11,5 mm for inlet sealing and sample introduction on GC systems. They function as dedicated accessories in gas chromatographic workflows, providing the interface between the syringe needle and the injection port. The CenterGuide (TM) design supports guided needle entry and helps sustain consistent septum behaviour across repeated injections. Packaged as 25 units per pack, these septa address laboratory needs where the N 11,5 format is specified by the instrument or method. Available from manufacturer Carl ROTH, Marathon Septa N 11,5 are suited to analytical chemistry, environmental testing, quality control and method-development environments that rely on stable GC inlet performance. Selecting the correct septum diameter and type contributes to dependable sealing and routine instrument readiness. The 11,5 mm size matches accessory requirements for this particular inlet class. These consumables belong to the core GC accessory range used to keep gas chromatography systems operating reliably during continuous laboratory analysis.
This article is part of Vial caps & septa, in Vials, caps & septa.
Key features
- Pack size: 25 pc(s)
- Product type: GC septum
- Model: Marathon Septa N 11,5
- Design: CenterGuide (TM)
- Diameter: 11,5 mm
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Questions about Marathon Septa N 11,5, CenterGuide (TM), Ø 11,5 mm, 25 unit(s)
What is this article?
Marathon Septa N 11,5, CenterGuide (TM), Ø 11,5 mm, 25 unit(s) is the article on this page. Luminix Health distributes Carl Roth for laboratory use. It sits in Vial caps & septa, inside Vials, caps & septa, in Chromatography equipment.
A vial cap and a septum have to match the vial neck: crimp, screw or snap, and the diameter. The septum material, PTFE/silicone or rubber, decides chemical resistance and how many times a needle can pierce it. A septum that sheds into the solvent becomes ghost peaks.
An autosampler vial is the small closed bottle a chromatograph picks up. The neck is crimp, screw or snap, and the cap and the septum have to be that neck. The septum is the part the needle pierces. A soft septum reseals. A septum that is wrong for the solvent swells or sheds particles into the sample. Inserts reduce the volume when the sample is scarce. The separation they feed is described with IUPAC names and PubChem data.
Which category should I open next?
The category is Vials, caps & septa. The sub-category is Vial caps & septa. The catalogue is Chromatography equipment.
Shelves beside this one are Chromatography accessories, Autosampler vials, Crimpers & decappers and Vial inserts.
What should I check before I order?
The technical information on this page is the manufacturer's sheet. Read that, not a rewritten specification.
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
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Luminix Health distributes this article from the heart of Europe. Articles in stock ship within 2–5 business days. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.